Aqueous dispersion composition containing microcrystalline cellulose and composition using the same

Abstract

PCT No. PCT/JP94/01949 Sec. 371 Date Aug. 15, 1996 Sec. 102(e) Date Aug. 15, 1996 PCT Filed Nov. 18, 1994 PCT Pub. No. WO95/22571 PCT Pub. Date Aug. 24, 1995An aqueous dispersion composition having excellent properties as a basic composition of a paper coating for improving printability, a paper strengthening agent, a cement compounding additive, a paint, an adhesive, etc., and a coating composition, a pulp composition and a mortar composition each containing the aqueous dispersion composition. The aqueous dispersion composition comprises an epoxy resin aqueous dispersion consisting of 100 parts by weight of an epoxy resin, 0.1 to 5.0 parts by weight of microcrystalline cellulose, and 0.1 to 10 parts by weight of a surface active agent; and a water-insoluble polyamine type curing agent. Use of the aqueous dispersion composition provides a coating composition, a pulp composition and a mortar composition each having excellent handling properties with respect to adhesion and viscosity, and excellent stability after curing even under a high temperature and high humid condition or a low temperature and low humid condition.

We claim: 
     
       1. An aqueous dispersion composition comprising an epoxy resin aqueous dispersion consisting of 100 parts by weight of an epoxy resin, 0.1 to 5.0 parts by weight of microcrystalline cellulose, and 0.1 to 10 parts by weight of a surface active agent; and a water-insoluble polyamine curing agent, wherein said epoxy resin aqueous dispersion has an average particle size, as measured by a laser particle size distribution meter, of less than 10 μm, and said water-insoluble polyamine curing agent is a curing agent comprising at least one member selected the group consisting of a reaction product between a polyalkylene polyamine and a polymerized fatty acid, an alicyclic polyamine compound modified with an epoxy resin, and an aliphatic polyamine compound modified with an epoxy resin. 
     
     
       2. The aqueous dispersion composition as in claim 1, wherein said epoxy resin has an epoxy equivalent of from 100 to 1,500. 
     
     
       3. The aqueous dispersion composition as in claim 1, wherein said epoxy resin is a polymer obtained by polymerizing at least one monomer selected from the group consisting of glycidyl ethers, glycidyl esters, glycidylamines, linear aliphatic epoxides, and alicyclic epoxides. 
     
     
       4. The aqueous dispersion composition as in claim 1, wherein said surface active agent is selected from the group consisting of anionic surface active agents, cationic surface active agents, amphoteric surface active agents, and nonionic surface active agents. 
     
     
       5. A coating composition comprising a pigment for paper and a binder for the pigment, which contains 0.1 to 5 parts by weight of the aqueous dispersion composition as defined in claim 1 and 6 to 20 parts by weight of the binder for the pigment each per 100 parts by weight of the pigment for paper. 
     
     
       6. The coating composition as in claim 5, wherein said aqueous dispersion composition has a weight ratio of the epoxy resin to the water-insoluble polyamine curing agent of from 0.1 to 2.0. 
     
     
       7. A pulp which contains 0.1 to 5 parts by weight of the aqueous dispersion composition as defined in claim 1 per 100 parts by weight of the pulp. 
     
     
       8. The pulp composition as in claim 7, wherein said aqueous dispersion composition has a weight ratio of the epoxy resin to the water-insoluble polyamine curing agent of from 0.1 to 2.0. 
     
     
       9. A mortar composition comprising cement and aggregate, which contains 3 to 35 parts by weight of the aqueous dispersion composition as defined in claim 1 and 50 to 500 parts by weight of an aggregate per 100 parts by weight of the cement. 
     
     
       10. The mortar composition as in claim 9, wherein said aqueous dispersion composition has a weight ratio of the epoxy resin to the water-insoluble polyamine curing agent of from 0.5 to 2.5. 
     
     
       11. The mortar composition as in claim 9, which further comprises 10 to 120 parts by weight of at least one latex selected from the group consisting of a styrene-butadiene copolymer latex and an acrylic copolymer latex.